| .cfg |
Celestia Configuration File |
| .cpr |
Cubase Project |
| .c2r |
Windows Media Center Click-To-Record File |
| .camproj |
Camtasia Studio Project |
| .cdx |
Compound Index File |
| .cdf |
Computable Document Format File |
| .ccp |
CopperCube JavaScript File |
| .config |
Configuration File |
| .ctt |
Messenger Contact List |
| .cd |
Visual Studio Class Diagram |
| .camp |
WCS Color Appearance Model Profile File |
| .cpx |
Oracle ADF Binding Context File |
| .contour |
Contour Screenplay File |
| .compositefont |
Windows Composite Font File |
| .csn |
Adobe Code Snippet Document |
| .cml |
Chemical Markup Language File |
| .cbp |
Code::Blocks Project File |
| .cdxml |
ChemDraw XML File |
| .cba |
Comic Book ACE Archive |
| .cys |
Cytoscape Session File |
| .cdlx |
Audition CD Layout File |
| .caproj |
Construct Project File |
| .c4p |
CrossOver Software Installer File |
| .circ |
Logisim Circuit File |